Valve.



Patented Aug. 2.0, I901. L. SGHUTTE.

VALVE.

(Application filed June 8, 1900.)

(No Model.)

lllvr rnn Frames Patent I lrricn.

LOUIS SOI-IUTTE, OF PHILADELPHIA, PENNSYLVANIA.

VALVE.

SPECIFICATION forming part of Letters Patent No. 680,737, dated August20, 1901.

Application filed June 8, 1900. SorialNo-19,520. (No model.)

To all whom it may concern.-

Be it known that I, LoUIs ScHUrTE, a citizen of the United States ofAmerica, residing in the city and county of Philadelphia, in the Stateof Pennsylvania, have invented certain new and useful Improvements inValves, of which the following is a true and exact description,reference being had to the accompan yin g drawings, which form a partthereof.

My invention relates to the construction of valves, and has for itsobject to provide a valve of simple construction and one especiallyadapted for use in connection with high pressures, my improvementconsisting in a special construction whereby the valve is perfectlybalanced when open and whereby when closed pressure from eitherdirection tends to seat the valve; also, in other details ofconstruction, all of which will be best understood as described inconnection with the drawings, in which they are illustrated, and inwhich- Figure 1 is a central sectional elevation of a Valve embodying myinvention; Fig. 2, a cross-section on the line 2 2 of Fig. 1; Fig. 3, acentral sectional elevation of a valve embodying my invention withcertain modification, and Fig. 4 a cross-section on the irregular line4; a of Fig. 3.

Describing first the construction shown in Fig. 1, A indicates thevalve-casing, divided into two chambers A and A by a partition, in whichis formed the val ve-seated port, (indicated at A A is an annularinternallythreaded projection from the top of the val vecasingcontinued, as shown, in the lower part of which is formed the internallycylindrical surface A", which communicates with the chamber A through acylindrical portion A of less diameter. A indicates a cylindricalopening formed in the bottom of the casing leading from the chamber AThe diameter of the cylindrical portion A should be at least equal toand preferably somewhat in excess of the greater diameter of thevalveseat A and the diameter of the cylindrical opening A should begreater than the smaller diameter of the valve-seat and less than itslarger diameter. B indicates the valve, fitting on the conical seat Aand having connected with its upper face the piston-like extension B,which for the best results should be equal in diameter to the cylinder Aand of course somewhat less in diameter than the greater diameter of thevalve B, 13 in dicating the annular surface equal in breadth to thedifference between the greater diameter of the valve-seat and valve andthediameter of the piston B. B indicates an extension from the lowerface of the valve, having formed on it the piston-head 13*, below whichthere are also formed on it the cylindrical portion B and threadedportion B. B B B indicate an opening leading from the top of the pistonB through the valve, the stem B and piston-head B. B indicates a slottedarm extending from the top of the piston B, B indicating the slot. At 6,I have indicated the piston attached to the pistonhead B consisting inthe first place of the piston-packing O, fitting in the cylinder A thepacking-ring U and. the nut 0 D indicates cylinder-packing secured inthe oylindrical opening A by the action of the packing-ring D, clampedin place by the cap E screwing into the annular extension A and havingformed in its upper portion the threaded perforation E. F indicates apiston-actuating rod which is adapted to enter the slot B, as shown, andhas an enlarged end F, which rests on or near the top of the piston B, Hbeing a ring situated on the rod F and placed between the head F and thesides of the bracket B The valve-rod is threaded, as indicated at Fwhere it passes through the threaded perforation E and squared near itstop to receive the handwheel G, which is held in place by a nut screwingon a threaded terminal F The modified construction shown in Figs. 3 and4 does not differ in material respects from that shown in Figs. 1 and 2.I have indicated the similar though somewhat different parts by smallletters having the same exponents as the capital letters in Figs. 1 and2, and will only call attention to the features in which themodification presents salient differences from the construction alreadydescribed. As shown in Fig. 3, the piston extension b is open at top andhas screwing into it a perforated plug I, through which extendstransversely a pivot-pin I. In place of holding the ring D and packing Din place by the cap E the modification shows it held pin 1 extends thelink N.

in place by an externally-threaded annular ring, (indicated at e.) Thecasting in the modification has perforated lugs a a, which extend upfrom opposite sides of the annular extension a and to these lugs aresecured, as shown, cross-bars K K, having cylindrical hearings formed inthem, as indicated at K K. These' bearings support the circular blocks LL, connected together at one side, as by a cross-bar L from whichextends a lever-arm L L L indicate eccentrically-placed opposite holesin the blocks L L, supporting the pin, (indicated at M,) between whichand the It will readily be seen that by turning the handle L the valveis raised or lowered, just as in the case of Fig. 1 it is raised orlowered by turning the hand-wheel G.

It will readily be seen that as the pistons B and O are of equaldiameter the valve when opened is exposed to equal and opposite pressurein both directions and is perfectly balanced. When the valve is closed,an excessive pressure coming into the chamber A acts to hold the valveto its seat by a pressure applied on the annular shoulder B On the otherhand pressure on the chamber A also tends to hold the valve to its seat,because it acts in a direction to seat the valve on the piston O, whichis larger than the smaller diameter of the valve B, upon which thepressure acts in the other direction.

The construction described has also the advantage of permitting theready insertion of the valve through the annular extension A The partsmaking up the piston proper (indicated at 0) being removed, piston O andthe parts making up the cylinder-packing at the top of the valve beingalso removed, the valve can be inserted in place and the packing devicesafterward inserted and secured as shown.

The function of the opening B B B is to permit any water leaking throughthe pack ing D to escape through the valve and its extension, where itis less troublesome and more easily observed than if it accumulated ontop of the valve-chamber.

Having now described my invention, what I claim as new, and desire tosecure by Letters Patent, is-

1. In a valve, a casing having chambers, as A A connected by avalve-seated port, as A, a cylinder, as A situated below the valveseatof greater area than its narrower portion and a cylinder situated abovesaid seat of less area than its broader portion, in combination with avalve, as B, adapted to seat itself on the valve-seat, a piston, as 0,attached to the valve and moving in the lower cylinder, a piston, as B,also attached to the valve and moving in the upper cylinder and meansfor actuating said valve.

seat of greater area than its narrower portion and a cylinder situatedabove said seat of less area than its broader portion, in combinationwith a valve, as B, adapted to seat itself on the valve-seat, a piston,as 0, attached to the valve and moving in the lower cylinder, a piston,as B, also attached to the valve and moving in the upper cylinder, anopening, as B B B through the pistons and valve, and means for actuatingsaid valve.

3. In a valve, a casing having cylinders, as A and D D, of equaldiameters and arranged in line with each other and a valve-seated port,as A situated between said cylinders, the valve-seat being in itssmaller diameter narrower than the lower cylinder and in its largerdiameter larger than the upper cylin der, in combination with a valve,as B, adapted to seat itself on the seat of port, A, and

- having attached to it pistons O and B of equal diameter moving in thecylinders aforesaid.

4. A valve-casing, as A, having two chambers connected by a valve-seatedport, as A, an opening, as A above and in line with the port of adiameter not less than the greater diameter of the valve-seat, and acylindrical opening, as A below the seat of a diameter less than thegreater and more than the lesser diameters of said seat, in combinationwith a valve, as B, adapted to seat itself on the seat in the casing andto pass through opening A a piston-head, as B, secured to the lower faceof the valve and of less than the narrowest diameter of the seat, apiston, as B, secured to the upper face of the valve and of lessdiameter than opening A cylinderpacking, as D D, and means for securingit in opening A and around piston B after said piston is in place andpiston packing, as 0 C and means for securing it to piston-head B and incylinder A after said cylinder-head is in place.

5. A valve-casing, as 'A, having two chambers connected by avalve-seated port, as A an opening, as A above and in line with the portof a diameter not less than the greater diameter of the valve-seat, anda cylindrical opening, as A below the seat of a diameter less than thegreater and more than the lesser diameters of said seat, in combinationwith a valve, as B, adapted to seat itself on the 1 IIO 13, secured tothe upper face of the valve and LOUIS SOI'IUTTE.

Witnesses:

OHAs. F. MYERS, D. STEWART.

